Windows apps
Collapse the table of content
Expand the table of content
Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

WM_TIMER message

Posted to the installing thread's message queue when a timer expires. The message is posted by the GetMessage or PeekMessage function.


#define WM_TIMER                        0x0113

Parameters

wParam [in]

The timer identifier.

lParam [in]

A pointer to an application-defined callback function that was passed to the SetTimer function when the timer was installed.

Return value

Type: LRESULT

An application should return zero if it processes this message.

Remarks

You can process the message by providing a WM_TIMER case in the window procedure. Otherwise, DispatchMessage will call the TimerProc callback function specified in the call to the SetTimer function used to install the timer.

The WM_TIMER message is a low-priority message. The GetMessage and PeekMessage functions post this message only when no other higher-priority messages are in the thread's message queue.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Winuser.h (include Windows.h)

See also

Reference
GetMessage
PeekMessage
SetTimer
TimerProc
Conceptual
Timers

 

 

Show:
© 2017 Microsoft